User manual

Groundsmaster 4000--D/4010--D Page 5 -- 31 Electrical System
Air Conditioning Switch (Groundsmaster 4010--D)
The air conditioning switch is used to control operation
of the air conditioning system on the Groundsmaster
4010--D.Theswitchis located inthecab headliner (Fig.
35).
Testing
1. Make sure ignition switch is OFF. Remove key from
ignition switch.
2. Remove switch plate from cab headliner.
3. Locate air conditioning switch and unplug wire har-
ness connector from switch.
4. Theswitchterminalsaremarkedas shown inFigure
36. The circuit logic of the air conditioning switch is
shown in the chart below. With the use of a multimeter
(ohmssetting),theswitchfunctionsmaybetestedtode-
termine whether continuity exists between the various
terminals for each position. Verify continuity between
switch terminals. Replace switch if testing identifies a
faulty switch.
SWITCH
POSITION
CLOSED
CIRCUITS
OPEN
CIRCUITS
AC OFF 2+3
5+6
2+1
5+4
AC ON 2+1
5+4
2+3
5+6
5. If switch tests correctly and circuit problem still ex-
ists,checkwireharness(seeElectricalSchematicsand
Wire Harness Drawings in Chapter 10 -- Foldout Draw-
ings).
6. Connectthewireharness connectortotheaircondi-
tioning switch after testing.
7. Installswitch plate to cab headliner after s witch test-
ing is complete.
1. Cab headliner 2. Air conditioning switch
Figure 35
1
2
Figure 36
12
4
3
56
BACK OF SWITCH
Electrical
System